/* `dir', `vdir' and `ls' directory listing programs for GNU.
Modified by Chet Ramey for Readline.
Copyright (C) 1985, 1988, 1990-1991, 1995-2010, 2012, 2017
Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Richard Stallman and David MacKenzie. */
/* Color support by Peter Anvin <Peter.Anvin@linux.org> and Dennis
Flaherty <dennisf@denix.elk.miles.com> based on original patches by
Greg Lee <lee@uhunix.uhcc.hawaii.edu>. */
#define READLINE_LIBRARY
#if defined (HAVE_CONFIG_H)
# include <config.h>
#endif
#include <stdio.h>
// strdup() / strcpy()
#if defined (HAVE_STRING_H)
# include <string.h>
#else /* !HAVE_STRING_H */
# include <strings.h>
#endif /* !HAVE_STRING_H */
// abort()
#if defined (HAVE_STDLIB_H)
# include <stdlib.h>
#else
# include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */
#include "rldefs.h" // STREQ, savestring
#include "readline.h"
#include "rlprivate.h"
#include "rlshell.h"
#include "xmalloc.h"
#include "colors.h"
#include "parse-colors.h"
#if defined (COLOR_SUPPORT)
static bool get_funky_string (char **dest, const char **src, bool equals_end, size_t *output_count);
struct bin_str _rl_color_indicator[] =
{
{ LEN_STR_PAIR ("\033[") }, // lc: Left of color sequence
{ LEN_STR_PAIR ("m") }, // rc: Right of color sequence
{ 0, NULL }, // ec: End color (replaces lc+no+rc)
{ LEN_STR_PAIR ("0") }, // rs: Reset to ordinary colors
{ 0, NULL }, // no: Normal
{ 0, NULL }, // fi: File: default
{ LEN_STR_PAIR ("01;34") }, // di: Directory: bright blue
{ LEN_STR_PAIR ("01;36") }, // ln: Symlink: bright cyan
{ LEN_STR_PAIR ("33") }, // pi: Pipe: yellow/brown
{ LEN_STR_PAIR ("01;35") }, // so: Socket: bright magenta
{ LEN_STR_PAIR ("01;33") }, // bd: Block device: bright yellow
{ LEN_STR_PAIR ("01;33") }, // cd: Char device: bright yellow
{ 0, NULL }, // mi: Missing file: undefined
{ 0, NULL }, // or: Orphaned symlink: undefined
{ LEN_STR_PAIR ("01;32") }, // ex: Executable: bright green
{ LEN_STR_PAIR ("01;35") }, // do: Door: bright magenta
{ LEN_STR_PAIR ("37;41") }, // su: setuid: white on red
{ LEN_STR_PAIR ("30;43") }, // sg: setgid: black on yellow
{ LEN_STR_PAIR ("37;44") }, // st: sticky: black on blue
{ LEN_STR_PAIR ("34;42") }, // ow: other-writable: blue on green
{ LEN_STR_PAIR ("30;42") }, // tw: ow w/ sticky: black on green
{ LEN_STR_PAIR ("30;41") }, // ca: black on red
{ 0, NULL }, // mh: disabled by default
{ LEN_STR_PAIR ("\033[K") }, // cl: clear to end of line
};
/* Parse a string as part of the LS_COLORS variable; this may involve
decoding all kinds of escape characters. If equals_end is set an
unescaped equal sign ends the string, otherwise only a : or \0
does. Set *OUTPUT_COUNT to the number of bytes output. Return
true if successful.
The resulting string is *not* null-terminated, but may contain
embedded nulls.
Note that both dest and src are char **; on return they point to
the first free byte after the array and the character that ended
the input string, respectively. */
static bool
get_funky_string (char **dest, const char **src, bool equals_end, size_t *output_count) {
char num; /* For numerical codes */
size_t count; /* Something to count with */
enum {
ST_GND, ST_BACKSLASH, ST_OCTAL, ST_HEX, ST_CARET, ST_END, ST_ERROR
} state;
const char *p;
char *q;
p = *src; /* We don't want to double-indirect */
q = *dest; /* the whole darn time. */
count = 0; /* No characters counted in yet. */
num = 0;
state = ST_GND; /* Start in ground state. */
while (state < ST_END)
{
switch (state)
{
case ST_GND: /* Ground state (no escapes) */
switch (*p)
{
case ':':
case '\0':
state = ST_END; /* End of string */
break;
case '\\':
state = ST_BACKSLASH; /* Backslash scape sequence */
++p;
break;
case '^':
state = ST_CARET; /* Caret escape */
++p;
break;
case '=':
if (equals_end)
{
state = ST_END; /* End */
break;
}
/* else fall through */
default:
*(q++) = *(p++);
++count;
break;
}
break;
case ST_BACKSLASH: /* Backslash escaped character */
switch (*p)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
state = ST_OCTAL; /* Octal sequence */
num = *p - '0';
break;
case 'x':
case 'X':
state = ST_HEX; /* Hex sequence */
num = 0;
break;
case 'a': /* Bell */
num = '\a';
break;
case 'b': /* Backspace */
num = '\b';
break;
case 'e': /* Escape */
num = 27;
break;
case 'f': /* Form feed */
num = '\f';
break;
case 'n': /* Newline */
num = '\n';
break;
case 'r': /* Carriage return */
num = '\r';
break;
case 't': /* Tab */
num = '\t';
break;
case 'v': /* Vtab */
num = '\v';
break;
case '?': /* Delete */
num = 127;
break;
case '_': /* Space */
num = ' ';
break;
case '\0': /* End of string */
state = ST_ERROR; /* Error! */
break;
default: /* Escaped character like \ ^ : = */
num = *p;
break;
}
if (state == ST_BACKSLASH)
{
*(q++) = num;
++count;
state = ST_GND;
}
++p;
break;
case ST_OCTAL: /* Octal sequence */
if (*p < '0' || *p > '7')
{
*(q++) = num;
++count;
state = ST_GND;
}
else
num = (num << 3) + (*(p++) - '0');
break;
case ST_HEX: /* Hex sequence */
switch (*p)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
num = (num << 4) + (*(p++) - '0');
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
num = (num << 4) + (*(p++) - 'a') + 10;
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
num = (num << 4) + (*(p++) - 'A') + 10;
break;
default:
*(q++) = num;
++count;
state = ST_GND;
break;
}
break;
case ST_CARET: /* Caret escape */
state = ST_GND; /* Should be the next state... */
if (*p >= '@' && *p <= '~')
{
*(q++) = *(p++) & 037;
++count;
}
else if (*p == '?')
{
*(q++) = 127;
++count;
}
else
state = ST_ERROR;
break;
default:
/* should we ? */
/* abort (); no, we should not */
state = ST_ERROR;
break;
}
}
*dest = q;
*src = p;
*output_count = count;
return state != ST_ERROR;
}
#endif /* COLOR_SUPPORT */
void _rl_parse_colors(void)
{
#if defined (COLOR_SUPPORT)
const char *p; /* Pointer to character being parsed */
char *buf; /* color_buf buffer pointer */
int state; /* State of parser */
int ind_no; /* Indicator number */
char label[3]; /* Indicator label */
COLOR_EXT_TYPE *ext; /* Extension we are working on */
p = sh_get_env_value ("LS_COLORS");
if (p == 0 || *p == '\0')
{
_rl_color_ext_list = NULL;
return;
}
ext = NULL;
strcpy (label, "??");
/* This is an overly conservative estimate, but any possible
LS_COLORS string will *not* generate a color_buf longer than
itself, so it is a safe way of allocating a buffer in
advance. */
buf = color_buf = savestring (p);
state = 1;
while (state > 0)
{
switch (state)
{
case 1: /* First label character */
switch (*p)
{
case ':':
++p;
break;
case '*':
/* Allocate new extension block and add to head of
linked list (this way a later definition will
override an earlier one, which can be useful for
having terminal-specific defs override global). */
ext = (COLOR_EXT_TYPE *)xmalloc (sizeof *ext);
ext->next = _rl_color_ext_list;
_rl_color_ext_list = ext;
++p;
ext->ext.string = buf;
state = (get_funky_string (&buf, &p, true, &ext->ext.len)
? 4 : -1);
break;
case '\0':
state = 0; /* Done! */
break;
default: /* Assume it is file type label */
label[0] = *(p++);
state = 2;
break;
}
break;
case 2: /* Second label character */
if (*p)
{
label[1] = *(p++);
state = 3;
}
else
state = -1; /* Error */
break;
case 3: /* Equal sign after indicator label */
state = -1; /* Assume failure... */
if (*(p++) == '=')/* It *should* be... */
{
for (ind_no = 0; indicator_name[ind_no] != NULL; ++ind_no)
{
if (STREQ (label, indicator_name[ind_no]))
{
_rl_color_indicator[ind_no].string = buf;
state = (get_funky_string (&buf, &p, false,
&_rl_color_indicator[ind_no].len)
? 1 : -1);
break;
}
}
if (state == -1)
{
_rl_errmsg ("LS_COLORS: unrecognized prefix: %s", label);
/* recover from an unrecognized prefix */
while (p && *p && *p != ':')
p++;
if (p && *p == ':')
state = 1;
else if (p && *p == 0)
state = 0;
}
}
break;
case 4: /* Equal sign after *.ext */
if (*(p++) == '=')
{
ext->seq.string = buf;
state = (get_funky_string (&buf, &p, false, &ext->seq.len)
? 1 : -1);
}
else
state = -1;
/* XXX - recover here as with an unrecognized prefix? */
if (state == -1 && ext->ext.string)
_rl_errmsg ("LS_COLORS: syntax error: %s", ext->ext.string);
break;
}
}
if (state < 0)
{
COLOR_EXT_TYPE *e;
COLOR_EXT_TYPE *e2;
_rl_errmsg ("unparsable value for LS_COLORS environment variable");
free (color_buf);
for (e = _rl_color_ext_list; e != NULL; /* empty */)
{
e2 = e;
e = e->next;
free (e2);
}
_rl_color_ext_list = NULL;
_rl_colored_stats = 0; /* can't have colored stats without colors */
}
#else /* !COLOR_SUPPORT */
;
#endif /* !COLOR_SUPPORT */
}
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to parse-colors.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / readline